Placida dakariensis

Placida dakariensis (Pruvot-Fol, 1953)

• Hermaea dakariensis Pruvot-Fol, 1953

Descripción
Cuerpo blanco translúcido con las ramas del hepatopáncreas de color verde pálido, sin la pigmentación rojiza superficial de otras especies similares. Presenta gránulos de color blanco opaco en el tercio distal de rinóforos y cerata, así como en el área cardiaca. Dispone de unos 20 cerata muy alargados a cada lado del cuerpo, distribuidos en filas de 3 alturas, formando una banda lateral. Los cerata más largos son los situados más cerca de la línea media del cuerpo. La glandula digestiva se ramifica por el dorso y rinóforos, penetrando en los ceratas sin ramificarse. Algunos ejemplares tienen manchas de color verde negruzco en la cara interna de los cerata y en el dorso. En el área cardiaca no se observan ramificaciones de la glándula digestiva. El ano está situado en un pedúnculo ancho y corto por delante del área cardiaca, mientras que el gonoporo está ubicado un poco por detrás y por debajo del ojo derecho. Los rinóforos son cilindrocónicos, largos y estrechos, y no están auriculados. El borde anterior del pie está ensanchado y ligeramente bilobulado, con la suela de color blanco, aunque permite ver por transparencia el sistema digestivo ramificado interno (hepatopáncreas) cuando está lleno.

Biología
Los ejemplares recolectados fueron hallados sobre algas verdes del género Bryopsis Lamouroux, 1809, de los que se supone que se alimenta. No se conocen detalles de su reproducción. Al moverse lleva los ceratas oblicuos al cuerpo y a veces cruza los más grandes por encima del dorso.

Especies similares

• Placida viridis, debido a que la glándula digestiva del interior de sus cerata no se ramifica, pero P. dakariensis no presenta pigmentación rojiza en el cuerpo, ni las dos bandas rojas en la suela del pie, características de P. viridis. Los rinóforos son de diferente morfología.
• Placida dendritica y Placida verticillata, coloración muy parecida, pero en ambas la glándula digestiva del interior de los cerata se ramifica, cosa que no pasa en P.dakariensis. La morfologia radular es también diferente y permiten diferenciarlas fácilmente. El diente radular es característico en P.dakariensis y permite distinguirla de los otros miembros de la familia.

Etimología

• Placida. Del Latín “placeō”, satisfacer. También significa plácida, suave, tranquila, quieta, pacífica.
• Dakariensis. Indica la localidad donde fue descrita por primera vez (Dakar, Senegal).

Distribución
Su área de distribución conocida comprende, de momento, las islas Canarias y las costas de Senegal.

Citas georeferenciadas conocidas de la especie: Placida dakariensis

Fonts:
OBIS GROC 2010-2011 Enric Madrenas João Pedro Silva Bernard Picton GBIF	OPK VIMAR Manuel Ballesteros M@re Nostrum Altres fonts Marine Regions

Otras fotos

Placida dakariensis (cerata & radular teeth) by Pruvot-Fol (1953)

Placida dakariensis by Ortea et al (2006)

Placida dakariensis @ Gran Canaria by Mario Matute

Placida dakariensis @ Gran Canaria by Mario Matute

1246567 Placida dakariensis 1 eunomia-revista-en-cultura-de-la-legalidad 50 creator asc 1 45947 https://opistobranquis.info/wp-content/plugins/zotpress/
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Caballer, M. (2007). Catálogo de los sacoglosos y opistobranquios (Mollusca: Gastropoda) de sustrato rocoso de la Bahía de Santander. Revisión de los géneros con especies cripticas. University of Cantabria
Caballer, M., Ortea, J., Moro, L. (2006). Redescripción y reubicación genérica de Hermaea dakariensis Pruvot-Fol, 1953 (Mollusca, Sacoglossa) a partir de ejemplares de las islas Canarias. Vieraea, 34, 59-63.
Jensen, K. R. (2007). Biogeography of the Sacoglossa (Mollusca, Opisthobranchia). Bonner Zoologische Beiträge, 55(3-4), 255-281.
Ortea, J., Moro, L., Bacallado, J. J., Caballer, M. (2013). Sucinto análisis histórico sobre el estudio e investigación de las babosas marinas (moluscos opistobranquios y sacoglossos) de Canarias y su entorno. Revista de la Academia Canaria de las Ciencias, 25, 221-235.
Bibliografía basada en los trabajos de Steve Long, 2006. Bibliography of Opisthobranchia 1554-2000 y Gary McDonald, 2009. Bibliographia Nudibranchia, con actualizaciones posteriores procedentes de otras fuentes.

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